RT7296DGJ8F

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RT7296DGJ8F is a DC/DC buck switching regulator. It is a 40V/1A integrated power conversion regulator specifically designed to save board space and to provide continuous output current up to 1A using an adjustable external resistor.

The RT7296DGJ8F is designed to be used in the latest lithium-ion (Li-Ion) battery powered applications and provides a PWM frequency of 250kHz with a minimum 2% accuracy over load, line and temperature. Its wide input voltage range (2.5V to 40V) allows a wide range of applications, from single-cell Li-ion battery powered systems to high voltage stepped-down voltage applications. It has a wide adjustable output voltage range (2.5V to 45V), output current of 1A, and an over-current protection circuit that can be used to protect against short circuits.

The RT7296DGJ8F is the perfect solution for low input voltage conditions where the output voltage needs to be more than the input voltage. With its high efficiency and low external component count, the RT7296DGJ8F is especially suitable for space-constrained, thermal-sensitive products.

Features

• Wide adjustable output voltage range: 2.5V-45V.
• Integrated power conversion regulator.
• Input voltage range: 2.5V-40V.
• Output current up to 1A with adjustable external resistor.
• PWM frequency of 250kHz with a minimum 2% accuracy.
• High efficiency up to 95%.
• Over-current protection circuit.
• Thermal protection circuitry.

Application Areas

The RT7296DGJ8F is ideal for applications such as mobile phones, MP3 players, PDAs, notebook computers, LCD TVs, portable DVD players, and other portable electronic devices.

It is also suitable for other general purpose applications such as LED drivers, power adapters, and various battery-powered systems.

Working Principle

The RT7296DGJ8F is a step-down DC/DC converter that can be used to reduce the voltage of a system’s input voltage to its desired level. By utilizing two switches and an inductor, this buck regulator works by repeatedly charging and discharging the inductor. During the charging cycle, energy is stored in the inductor and then transferred to the output during the discharging cycle.

When the voltage source is connected to the input of the regulator, the first switch (SW1) is activated and current begins to flow, charging the inductor (L1). This process is interrupted when the second switch (SW2) is opened, which initiates the discharging cycle. The energy stored in the inductor is transferred to the output, and current begins to flow through the load. The two switches alternate between charging and discharging the inductor until the output voltage is regulated.

The RT7296DGJ8F also incorporates an over-current protection circuit to protect the system from short-circuits and prevent damage. It also has a thermal protection feature that shuts down the regulator when the die temperature exceeds the maximum allowable level.

Conclusion

The RT7296DGJ8F is a DC-DC step-down buck regulator that is specifically designed for battery powered systems and other low input voltage applications. With its wide input voltage range, adjustable output voltage range, and integrated power conversion regulator, the RT7296DGJ8F is an ideal solution for portable electronic devices and general-purpose applications.

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